N-α -Fmoc-D-2,3-diaminopropionic acid

N-α-Fmoc-D-2,3-diaminopropionic acid is a D-configured amino acid derivative bearing two adjacent amino groups on the 2,3-diaminopropionic acid backbone and an N-terminal Fmoc protecting group. The molecule contains a free carboxylic acid for coupling chemistry and a chiral center that enforces stereochemical control in peptide assembly and downstream derivatization. The Fmoc group provides orthogonal protection compatible with standard base-labile deprotection workflows, while the side-chain diamine functionality can be selectively protected, acylated, or converted into guanidinium-like or heterocyclic motifs depending on the chosen protection strategy. The presence of multiple nucleophilic amines yields a distinct reactivity profile for salt formation, peptide coupling, and post-coupling functionalization, making it a practical chiral intermediate for constructing diamino-containing peptide segments and amino acid-based building blocks.

1. Peptide Synthesis

N-α-Fmoc-D-2,3-diaminopropionic acid supports solid-phase peptide synthesis and related peptide building block preparation by combining an Fmoc-protected α-amine with a carboxylic acid handle for amide bond formation. The D-stereochemistry at the amino acid backbone can be retained during coupling to introduce stereodefined diamino motifs into peptides, including sequences requiring non-proteinogenic residues. The two adjacent side-chain amino groups enable subsequent orthogonal protection and selective deprotection steps, which can be used to control chemoselective modifications after chain assembly. Downstream peptide analogs prepared from this diamino amino acid can serve as substrates or ligands in biochemical assays and as scaffold elements in peptidomimetic construction.

2. Side-Chain Functionalization

N-α-Fmoc-D-2,3-diaminopropionic acid is well suited to amino acid derivatization workflows where the neighboring diamine pattern is leveraged for targeted chemical transformations. The free carboxyl group and protected α-amine allow controlled conversion into activated intermediates for coupling or for generating protected amino acid derivatives, while the two side-chain amines can undergo selective acylation, sulfonylation, or carbamate formation to tune nucleophilicity and solubility. Diamine-rich side chains can be cyclized to form heterocycles or converted into guanidinium-like functionalities that participate in hydrogen bonding and ionic interactions. The resulting functionalized products can be used to generate structure-activity relationship (SAR) libraries, labeling reagents, or chemical handles for further conjugation chemistry.

3. Chemical Biology Labeling

N-α-Fmoc-D-2,3-diaminopropionic acid can be applied in chemical biology and biomolecule modification strategies that require incorporation of a stereodefined diamino residue into peptide probes. The Fmoc group enables stepwise peptide construction, and the D-configuration helps define spatial presentation of the diamine side chain for molecular recognition studies. The adjacent amines can be transformed into reactive intermediates for conjugation, including derivatization routes that introduce electrophilic groups or stable cationic motifs for binding to nucleic acids, proteins, or engineered receptors. Peptide conjugates derived from this amino acid building block can function as analytical probes, affinity handles, or chemically defined substrates for studying amino acid-dependent binding and processing.

4. Peptidomimetics And SAR

N-α-Fmoc-D-2,3-diaminopropionic acid serves as a chiral precursor for peptidomimetic construction and SAR studies where diamino spacing and stereochemistry influence conformational preferences and interaction patterns. The amino acid backbone provides a site for amide linkage while the side-chain diamine can be protected or transformed to modulate charge density, hydrogen-bonding capacity, and metal coordination potential. The Fmoc-protected α-amine supports standardized peptide coupling chemistry, enabling reproducible incorporation into fragment-sized scaffolds and library members. Downstream derivatives can be used to generate structure-defined analogs for evaluating sequence effects, side-chain electronics, and stereochemical requirements in medicinal chemistry and biochemical research.

5. Process Chemistry Intermediate

N-α-Fmoc-D-2,3-diaminopropionic acid is suitable for process chemistry intermediate preparation in fine chemical synthesis due to its clear functional-group inventory and orthogonal protection logic. The Fmoc group provides a robust N-protection strategy for manufacturing-compatible peptide building block routes, while the carboxylic acid enables predictable activation and coupling chemistry in downstream steps. The diamine functionality supports staged protection approaches that can be mapped to industrially scalable derivatization sequences, including conversion to selectively protected forms prior to peptide assembly or conjugation. The compound's stereodefined D-configuration makes it a reliable chiral starting material for producing protected amino acid derivatives used in peptide manufacturing and chiral intermediate supply chains.

1. Low bone turnover and low BMD in Down syndrome: effect of intermittent PTH treatment

2. High fat diet and GLP-1 drugs induce pancreatic injury in mice

3. Extended exenatide administration enhances lipid metabolism and exacerbates pancreatic injury in mice on a high fat, high carbohydrate diet

4. An Isolated TCR αβ Restricted by HLA-A* 02: 01/CT37 Peptide Redirecting CD8+ T Cells to Kill and Secrete IFN-γ in Response to Lung Adenocarcinoma Cell Lines

5. Emerging applications of nanotechnology for diagnosis and therapy of disease: a review